GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 TrailBlazer - 4WD 🢒 Seats 🢒 Seat Hardware, Trim, and Upholstery 🢒 Inflatable Restraint Seat Position Sensor Replacement

Removal Procedure
  1. Remove the seat from the vehicle. Refer to Front Seat Replacement - Bucket.

    2. Object Number: 1333089 Size: SH
  2. Unclip the front, rear, and side J-strips (1, 2) on the underside of the seat.
  3. Remove the lumbar knob by pulling the knob straight away from the seat, if equipped.
  4. Remove the recliner handle. Refer to Driver or Passenger Seat Recliner Handle Replacement.

    5. Object Number: 1333092 Size: SH
  5. Remove the screws (2) that retain the lumbar adjustment mechanism (1) to the seat adjuster.
  6. Remove the lumbar cable from the lumbar adjustment mechanism.

    7. Object Number: 1333093 Size: SH
  7. Remove the 2 bolts (1) securing the seat recliner to the seat adjuster.
  8. Remove the seat back assembly from the seat cushion assembly.

    9. Object Number: 1333091 Size: SH
  9. Disconnect the seat belt buckle electrical connector (1).
  10. Disconnect the wiring harness (2) from the seat position switch.

    11. Object Number: 1333095 Size: SH
  11. Remove the bolt (2) securing the seat belt buckle assembly (1) to the seat adjuster.
  12. Remove the seat cushion cover and foam.
  13. Remove the assist spring.

    14. Object Number: 1333096 Size: SH
  14. Remove the 4 nuts (1) securing the seat cushion frame to the seat adjusters.
  15. Remove the seat adjusters.

    16. Object Number: 1333097 Size: SH
  16. Remove the 2 nuts (1) securing the seat position switch (3) to the seat adjuster (2).
  17. Drill out the rivets securing the sensor to the bracket.

Installation Procedure
  1. Install new rivets securing the sensor to the bracket.

    2. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1333097 Size: SH
  2. Install the seat position switch (3) to the seat adjuster (2) with 2 nuts (1) and tighten to 24 N·m (18 lb ft).

    3. Object Number: 1333096 Size: SH
  3. Install the seat adjusters to the seat cushion frame with 4 nuts (1) and tighten to 24 N·m (18 lb ft).
  4. Install the assist spring.

    5. Object Number: 1333095 Size: SH
  5. Install the seat cushion foam pad and cover to the frame.
  6. Install the seat belt buckle assembly (1) through the seat cushion pad.
  7. Install the seat belt buckle assembly (1) to the seat adjuster with the bolt (2) and tighten to 55 N·m (41 lb ft).

    8. Object Number: 1333091 Size: SH
  8. Connect the seat belt buckle electrical connector (1).
  9. Connect the wiring harness (2) to the seat position switch.
  10. Position the seat back assembly on the seat cushion assembly.

    11. Object Number: 1333093 Size: SH
  11. Install the 2 bolts (1) securing the seat recliner to the seat adjuster.

    12. Object Number: 1333092 Size: SH
  12. Install the lumbar adjustment mechanism (1) to the seat adjuster with the 2 screws (2).
  13. Install the lumbar cable to the lumbar adjustment mechanism.
  14. Install the lumbar knob by pushing the knob straight onto the shaft, if equipped.
  15. Install the recliner handle. Refer to Driver or Passenger Seat Recliner Handle Replacement.

    16. Object Number: 1333089 Size: SH
  16. Install the front, rear, and side J-strips (1, 2) to the underside of the seat.
  17. Install the seat in the vehicle. Refer to Front Seat Replacement - Bucket.